We at TRANQUILITY are developing kits as add-on hydrofoil technology for conventional personal watercrafts (PWCs), commonly referred to as jetskis.
Your benefits:
Conventional personal watercrafts (PWCs) face several challenges that limit their efficiency and comfort
The TRANQUILITY Hydrofoil Technology offers an innovative solution to resolve the shortcomings of conventional personal watercrafts.
The TRANQUILITY Hydrofoil Add-On Technology represents the world’s first Hydrofoil Kit for the conversion of a conventional waterjet driven PWC into a hydrofoil craft while maintaining the common jetski performance with the hydrofoils retracted on deck.
The Hydrofoil Kit can be applied to jetskis with electric drives and with combustion engines. It uses the single waterjet propulsion for both foil- & hullborne mode. With a top speed of 85 km/h (52.8 mph) it is one the fastest commercially available hydrofoils on the market. The high range economic cruising speed is 70 km/h (43.5 mph). The extraordinary flight height allows a very smooth ride in waves up to 0.8 meter.
The Tranquility Hydrofoil Kit consists of two retractable hydrofoil systems. One in the front and one in the rear, which lift the hull out of the water at about 35 km/h (21.7 mph). Both hydrofoils can be retracted on deck allowing to drive in the common hullborne mode. An integrated collision protection system in both hydrofoils protects the passengers from injuries in rare events of collisions with underwater obstacles.
A fully automated flight control system consisting of radar sensors, accelerometers, gyroscopes and actuators on the hydrofoils guarantees a safe & comfortable flight up to sea conditions with 0.8 meter wave height – IT FEELS LIKE CRUISING ON RAILS!
The core of the flight controller comes from Oceanflight Technologies GmbH which is one of the leading companies for hydrofoil flight control systems in this sector.
The add-on characteristic of the Hydrofoil Kit does not change neither the structure nor the geometry of conventional jetskis. The interface with the standard jetski is limited to a bold-on solution for the front and rear hydrofoil system plus the installation of the flight control system with actuators and potentially an adjustment of the impeller.
The global PWC market showed in 2024 approximately 145 000 new jetskis sold with an existing 3.6 million jetskis still in use.
A strongly growing market segment is touring / fishing / adventure, which is the target market for TRANQUILITY. The corresponding market share by volume was 30% in 2024 with a CAGR of 4.5% year by year until 2034.
Customers in this sector are looking for comfort & range combined with seaworthiness and decent speed.
The TRANQUILITY Technology offers a gamechanger in how people will go on explorations with their personal watercrafts.
TRANQUILITY offers an exceptional new ride experience with an unmatched comfort. Where conventional exploration tours faces limitations e.g in choppy seas, TRANQUILITY masters such conditions with souverenity up to 0.8 meter wave height. It feels like cruising on rails.
Energy/Fuel consumption is at least cut by half which duplicates the range accordingly.
The installation of the TRANQUILITY Hydrofoil Kit will be done in our qualified workshops.
The unique experience of hydrofoiling a jetski with the TRANQUILITY technology can be enjoyed as an owner of such a craft or in the framework of rental stations.
In the market of professional applications TRANQUILITY offers the conversion of professional PWCs into TRANQUILITY Hydrofoil Crafts on basis of individual specifications for the following markets:
Search and Rescue (SAR) as highspeed all weather rescue runners either stand alone or as fast interception crafts on board of SAR cruisers.
For Coast Guard applications such as coastline patrols and fast interception tasks e.g. terror attack mitigation tasks.
Military applications as fast unmanned Hydrofoil Drone Boats with stealth protection and largely reduced underwater signature in flight mode.
For our hydrofoil development we are using the YAMAHA FX Cruiser SVHO as a testcraft.
Over various phases of development with continuous improvement of the hydrofoil system we are now approaching the optimum performance parameters.
TRANQUILITY is the maritime branch of the project development company TakeOff Engineering GmbH (TOE).
It focuses on the development of add-on hydrofoil technology, turning Personal Water Crafts (PWCs), commonly referred to as jet skis, into hydrofoil crafts with offshore capabilities.
For a long time I have been intrigued by the potential and the challenges of hydrofoil crafts. Being a long-term member of the International Hydrofoil Society I was fascinated by the technology of Hydrofoil Crafts in particular with fully submerged hydrofoils and automatic flight control systems. At the end of my PHD Program at the Technical University Munich a friend of mine and I built out of curiosity a small hydrofoil testboat, which performed well. However the market for such vehicles was rather limited in 1990. While having a family with two small boys I decided to join the Linde Group where I stayed for 26 years.
During all those years I continued with theoretical work on the hydrodynamics of Hydrofoils as a side activity. In the meantime my hydrofoil companion became Professor at the Technical University Amberg in Bavaria, where my elder son Julian studied Mechanical Engineering. The initial funds allowed us to build a closed loop watertunnel with a testsection of 0.2m by 0.6m crossection and 2m length. For cavitation tests with hydrofoils and struts the tunnel was put under controlled vacuum. This facility together with the creation of Matlab based simulation tools for the full driving range of hydrofoil crafts including CFD-analysis gave us a deep inside into the hydrodynamics and the design of hydrofoils. The comprehensive dataset included the hollow rearstrut data for waterjet drives and was used to verify our various craft simulation tools.
This longterm development laid the foundation for our TRANQUILITY development.
When I was a young boy I already helped build and test our test hydrofoil crafts. So naturally I developed a similar obsession for hydrofoils as my father.
I remember very well, when my father asked me to take over the helm of our very first outboard driven hydrofoil craft during one of our test campaigns. We were foilborne going straight with 42 knots in choppy waters and I had to make a tight U-turn which was a breathtaking experience for a 5 year old boy!!!
From that moment on I felt being part of the development team. Over time I learned how to fabricate aluminum or carbon fiber hydrofoils & struts and I got first hand insides into the hydrodynamics of hydrofoils. During my engineering study term at the University Amberg in Bavaria I did all my official research projects in the hydrofoil domain with focus on fully submerged hydrofoils and waterjet drives. It included substantial CFD-analysis of hollow rear struts with internal flow analysis for the waterjet drive. The theoretical results were verified in a special closed cavitation watertunnel with free water surface and a wave generator.
All this work contributed significantly to our proprietary database as a solid platform to kick off our TRANQUILITY project. Over several years of intensive development with many test flights we are now approaching the targeted performance parameters.
We are committed to improve our future products towards sustainable and highly efficient hydrofoil crafts. With the development of our Hydrofoil Kits we will contribute significantly to the reduction of CO2 emissions of combustion engine driven PWCs (reduction ≥ 50%).
In the growing, electrically driven PWC sector we will at least double the range while having zero emissions.
We see the future of personal watercrafts to a major part as electrically driven crafts with zero emissions. As a complement for long range PWCs we believe in green hydrogen fuel cell driven crafts. We don’t see green ammonia or methanol as well as liquid hydrogen as an alternative as of now. Such fuels require substantial safeguarding measures for which PWCs do not offer enough space.
We welcome interested partners e.g as investors to join us in our fascinating journey towards advanced hydrofoils.
We would be happy to get in contact with you and talk about our TRANQUILITY Hydrofoil KIT for jetskis. Please email/call us or use our contact form below!
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